Blockly Project

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The Project

According to their site Blockly is: "A library for building visual programming editors."

Evaluation Scoring

July 2017

Evaluation Factor Level
Evaluation Data
Licensing 2 This project uses the Apache2.0 License
Language N/A Languages Include JavaScript (97%), HTMl (1.5%) and Python (1.4%).


Level of Activity 2 Blockly has had many regular commits both over the short term and the long term.
Number of Contributors 2 Blockly has a relatively large number of contributors, viewable here.
Product Size 2 Blockly has thousands of lines of code (61.9M MB worth of files). For samples, see the files in the section
Issue Tracker 2 The Blockly issue tracker is quite active, with new issues being opened within hours of writing, and assigned within 1-2 days. (195 open, 341 closed issues).
New Contributor 1 Blockly has a page with general instructions for new contributors here, specifically mentioning things such as that code must adhere to Google's JavaScript guidelines. However, these instructions are not particularly in-depth or instructive.
Community Norms 1 There do not appear to be clearly stated norms, however there is a fair amount of evidence that the community communication is professional and helpful on the forums
User Base 2 There is a fair amount of evidence for an active user-base. Aside from being an easy and accessible program (this is google we're talking about), there is a forum with almost 1500+ user feedback and request threads
Total Score (out of 16) 14 This could depend on your language preference and how much setup you need as a developer.
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